Yes, there is absolutely nothing wrong getting an 'ok' 750W PSU. The issue here is that:
1. It seems like OP is on a budget. Someone buying a 1050 Ti probably doesn't want to overkill on a PSU.
2. You can get a 500W unit of more quality for the same price aqua 750W unit with lesser quality .
3. Not many people need 750W units, (EVGA 1080s SC in SLI take about 400 watts alone. It doesn't make a lot of sense if you have a 1050 Ti and you buy a 750W power supply.