By challenging your own serve after the winner has gone by, aren't you getting 2 bites at the cherry? I wouldn't mind if they challenged while the point was still alive, but logistically that is impossible in this scenario.
I don't agree with the current interpretation of the rule. However, as it is currently within the rules, a player is entitled to the challenge, although I think this win at all costs attitude is poor sportsmanship.
It’s not reasonable at all to expect the challenge to be made within the fraction of a second it takes for the ball to be back on your own court. Sometimes not even the linesman can call it that quickly. If your opponent returns the serve and you hit it back, then of course you gave up the right to challenge the moment you hit it back. But not before.
Granting the challenge can only do one of two things, both of them harmless:
a) confirm that the return winner was legitimate because the serve was good (and you wasted a challenge) OR
b) confirm that your first serve was out, so you get a second serve.
Neither of those two outcomes causes the returner to lose the point outright.
But if the first serve was indeed out, and you refuse the server his right to challenge it, all you are doing is gifting the returner with a point he didn't win. Which means you are refusing to use the system for what it is intended: the correction of bad calls. An absurdity.