Not at all.
The Democrat strategy right now is Trump vs. Biden because it serves two purposes. One, they believe Biden can again beat Trump, as he did before. It also allows them to run an "anti-MAGA" campaign as you can clearly see by Biden's announcement video. They want Trump, J6, etc. in the spotlight.
Two, if Trump is the nominee, they're under much less pressure to replace Biden in the primaries. The last thing they want is a bloody primary battle against an incumbent president. They remember all too well Carter's re-election campaign being mortally wounded by Ted Kennedy before Ronald Reagan stepped in and delivered the death blow.
If someone other that Trump wins the GOP primary, this throws their entire strategy into disarray.
These polls make sense, I know many who would vote for DeSantis but not for Trump. Trump cannot change anyone’s mind at this point.