Maxing electronics in end game isn't a horrible idea, but it's not the most efficient way to approach the game. Here are a few reasons why:
Electronics has a limited use, mostly as a prerequisite for crafting Tier 0 stealth items such as suppressed weapons and breaching explosives. Even then, you're better off fabricating those items than you are trying to max Electronics to speed up the process.
It's generally better to prioritize other skills such as tactics, shooting and close combat, as these are more useful in end game and will help you play more efficiently.
Electronics is undoubtably a helpful skill, but it's definitely not mandatory for end game. Plus, it's not easy to level it up and it will take a significant amount of time, effor and resources that could be spent optimizing other skills and building your character more effectively.
Ultimately, it's up to you to decide if maxing Electronics skill power is the right move for your game style and end game plans, but keep in mind that it's often more beneficial to optimize your other skills and abilities first.