Not if you have the earthquake codes like in Washington state. Put a double wide on a two acre lot in Goldbar, WA. and followed all the new codes. Two years latter I sold it at a $80,000 profit. Went through inspection with no problem and the new owner got a loan with no problem. I really don’t see what all the fuss is about.
There are many ways to secure a MH or trailer to a foundation. Some are no better than no tie down at all. But the most secure I have seen (and installed) was one done to FHA loan standard (I think that was the standard, one of the gov;t agencies) Anyway, it looked like a solid spiderweb of cross bracing and tie downs under there. A dog couldn’t run through it very easily. If an earthquake knocked it off, it would have been the last structure in the area to fail, stick builts would have long since failed.