You've pretty much answered your own question - in a sense. 70-75 is damn warm for that kind of card. It's not overheating - that would be at 90C - but you're getting the kind of temps someone running a 2080 Super or RX 5700XT would see.
A 1050Ti is a pretty low power card, and shouldn't run very warm at all. But you've created the scenario for it to do so:
1)No case fans
2)Small form factor case. If the cards fans have an obstacle within an inch of them, they get choked of air.
3)Sits below your desk... in a small cubby or something? Where cool air is even further restricted?
4)If your gpu is like this, then I imagine the cpu is also running rather warm for it's specs...
Changing a fan curve won't fix anything, if there's no real access to cool air.
1)Find a better location for the case, where your hardware can draw in fresh air - and not another closed off space where the cpu and gpu recycle their own waste heat.
2)Tight spaces, such as in some SFF cases are where blower style gpu coolers shine! 2 and 3 fan models do not cool as effectively in such spaces. [I'm not expecting you to change your gpu over this, no. This is just FYI.]
3)Add some case fans! You can just do 1 or 2, some is better than none at all! The general orientation is front(bottom is usually optional) as intake, and rear and top as exhaust. Side fans... it depends on the position in the case.