Why disable it? If it keeps things cooler then why not let it do its job? I have noticed this new bike goes into this EITMS mode far quicker than the older bikes but it does not bother me.
I think it may have something to do with wanting to sound cool, rather than be cool, if you know what I mean.
With the Twin Cooled bikes it shouldn't be necessary to have EITMS engaged to protect the engine, so it truly becomes a rider comfort feature. If the rider isn't uncomfortable with the heat from the engine and exhaust while sitting at idle, I can't think of any reason to have to keep it engaged all the time. And of course if conditions change and they find themselves sitting still in traffic with a 100°F ambient air temp and a 140°F road temp baking them, they can easily turn the system back on to get a little relief from the engine and exhaust heat.
Btw, the reason it seems the new bike goes into EITMS mode far quicker is that on the Twin Cooled bikes Harley now uses ambient air temperature rather than cylinder head temperature to trigger the system. The trigger is 80°F air temp, so most of the summer the EITMS will be kicking in every time you stop for more than a few seconds.
Jerry