It's not a question of whether or not ulterior motives play into first-meetings, it's what comes after that.
Unless you are really fishing for some commitment, you probably do have your own reason for that initial conversation with someone. You're lonely, you think they're hot stuff, you want to be coddled, you have something to prove.
But once you've actually spoken with them, what happens next does not have to be based on anything but affection or fascination, not money or desire or revenge.
If you're interested and they are as well, pursue it. If not, you tried for whatever selfish reason you had and got nothing. It happens.
That's no reason to say that love is only based off of one thing, whatever you think that reason is.