As a former truck driver myself the first few thousand miles on new tires on my tractors always had them “ Squirrley “ the thick tread needed to break in. I hated the first few trips but they always settled in.
I’m not sure but Michelin Motorhome specific tires I’ve always believed are made with much less tread and a softer sidewall for “ride” concerns of motor home drivers. Motor home drivers are used to “car” ride and pretty picky expecting a “Cadillac ride” .from what is essentially a truck or bus chassis Long term mileage and constant use / abuse durability isn’t a priority on very low mileage vehicles.
My toyo 144 have been great they settled in pretty quickly.