What PRNGs lack compared to TRNGs is security (i.e. preventing someone from being able to use past values to predict future values). It's not that they somehow produce statistically invalid results (e.g. they generate 3s more often than 2s or something). Unless they're very poorly constructed.

Maybe people have bad memories from linear congruential generators, these could go really bad (https://en.wikipedia.org/wiki/Marsaglia%27s_theorem)