As long as Trump is within margins of Joe Biden in GA and TX in the polls, he'll take the states. In 2016, Michigan, Wisconsin, and Pennsylvania state polling had him down by 4 points in some polls but he was still able to win them.
That's not how margin of error works. It doesn't magically favor one candidate or the other, nor does it represent the absolute limit of difference from real results (IIRC polls report MOE at 95% confidence level).
Not to mention that sampling likely improved taking into account lessons from 2016.