Why this kalyana veri?

Agreed that I've been working for the last four years (almost). Agreed that I'm going to be 24. Agreed that I'm the only daughter to my parents. Agreed that they have this big kadamai to get me married to a nice, good-looking, kai neraya earning, well-mannered guy from a respectable, well-to-do family with no nacchu pidungals. But well, I don't want to tie the knot with this 'nice, good-looking, kai neraya earning, well-mannered guy from a respectable, well-to-do family with no nacchu pidungals' anytime soooooon!
I've been covering cinema for this very nice national newspaper, and almost everyone in my beat knows me. But, I want to become this supercool travel journalist, whose articles everyone will pick up and read and use as a guide when they want to travel. I also want to be this very super intelligent girl who goes on a 'i'm-going-to-uncover-the-secrets-behind-aandipatti's-lost-civilisation'! expedition.
So, what's the problem you ask. It's my marriage! I don't know if my husband, whoever it will be, will allow me to do all this. Not that I'll obey his orders lying down. But the point is, how can I freaking marry someone whom I don't know from Adam?!
And how can I expect him to give in to my whims and fancy?
So, all I did was ask my parents to let me be until I achieve my dreams (gloating now). So, they will have to just wait for about two more years, hopefully.
But no! amma appa will be amma appa. With whatever knowledge of computer and Internet they have (both are auditors and puli in kanakku. So, sparing calculator and excel sheet, I don't think they know much about computer potti!), they jump into the payyan paarthufying padalam.
With Tamilmatrimony, SSmatri and 200 other matrimony sites advertising their efficient search engines, my amma appa start their hunt.
Their criteria, apart from the abovementioned – no kousigam, 2-4 years elder than me, should belong to one of the 20 stars tat I'm compatible with , and look like one serial hero atleast. (PS in the middle of my post : While I flatly refused to let them put up my picture on the sites that they surf, I did allow them to write a smallish biography about my achievements online. I'm all heart, I know!)
Apart from the sites, my amma appa also started relying on their relatives, friends, pakkathu veetu maami, edhuthaathu mama, flower-selling aaya and newspaper podara paiyyan for information on eligible bachelors!
But hello, someone ask me if I have anyone particular in mind? And mom, you can’t ask this question (in a I-didn’t-bring-you-up-like-that-so-don’t-say-yes tone) while you are riding pillion with me on my 7-year-old scooty pep, while I sweat it out to balance you, your sotthu mootai (lunch bag), my sotthu moottai and my oversized LV imitation bag that I forced appa to pick up from roadside shop in T Nagar! Not especially when my ‘yes’ or a ‘no’ will barely be audible in that blood-curdling horn that kuppa vandi lets out.
Sigh. Sigh the sigh. Well, back to what I was trying to tell you all. Why are parents hell-bent on getting their daughters married to some X, Y or Z when they don’t want to? And why do they always try to convince them saying you should marry when the time is right or that your mama’s daughter’s son’s chitti’s mother’s aunt wants to see your kalyanam before they die? Will someone explain/enlighten me?