[smtddr]

>>It made me wonder in my own professional work: should I also focus more on getting things done instead of trying to find the best solution?

As an SDET who has dealt with code perfectionist, please just focus on getting things done and features shipped. Assuming that bugs aren't life & death in your product like car software to deploy airbags, or huge consequences/delays like a land rover destine for Mars missing its mark and flying off into space. Worry about all that perfectionist stuff later, when you're sure it actually matters. Until then, as long as your code isn't a hideous abomination, it's fine. Just ship it. If you have passionate QA/SDETs, they'll find the critical bugs and do performance tests if needed. This is especially true if the product had a good spec that it was developed around.

That said, don't take any shortcuts when it comes to security!