Elddis autoquest 196 tyre pressure

Quite a conundrum tyre pressures. I find it confusing and surprised manufacturers appear simply to offer up the maximum for the benefit of doubt I guess!

My 2018 Elddis accordo 135 indicates the same pressures as the much larger sibling Autoquest 185 for example, the Accordo with a 3300 Kg chassis and latterly 3500 Kg in the case of the Autoquest! So why would you expect the lower specification chassis to have an identical seemingly exaggerated pressure, the ride is awful in my view!

Whilst I haven't ventured to the weighbridge as yet, I'm more concerned should I reduce/experiment with lower pressures how will the law view the matter?

I suspect a few lbs won't matter, as my van includes calibrated TPS, I may well find my efforts thwarted in any event.....

I'm surprised a standard isn't in place for what is a very important matter, rant over.......

The TPMS on my Majestic nags incessantly unless the tyres are at rock hard pressures. Recalibration is, I understand, expensive and also likely to cause consternation at Peugeot dealers as there seems little documentation on the issue.