Taking 410 EC votes vs. 450 will change nothing in terms of politics in America 2021-24, nor will you personally care 2 weeks after the election in the hypothetical whether he got Texas or not. Trump won't even care, and he's the ***hole who lost in the scenario.
Yes, I want Texas and there are good reasons to invest in Texas.
But Texas is not a priority relative to something like 10 other states by any reasonable or objective calculus. Secure those 10 states first as best as possible and then worry about Texas.
You don't (or oughtn't at least) manage campaigns based on emotional wants, wishes or gut feels.
And all of this ignores Texas is very unlikely to flip independent of investment and if it does flip, it probably is owing a **** of a lot more to systemic polling error than some 6 week media blitz.