John, I genuinely wish you were right. The BLM rule is that an eMTB is a motorcycle and banned from non-motorized trails UNLESS, the local BLM office proposes to make a trail or are eMTB accessible and does so after an environmental assessment. This is as of 12/2021. New trails or areas have not yet been proposed.
In the Lake Tahoe the US Forest Supervisor opened 200 miles of non-motorized trails to eMTBs, and the Washington office reversed him. No trails open to eMTB. As of today, all USFS non-motorized trails are closed to eMTBs.
I ride mostly USFS trails and local rangers strictly enforce any encroachment on mtn bike-hiking trails by eMTBs.
In gen., its the most experienced MTB riders that are hostile to eMTB. A study by the bike industry (People for Bikes) found that 1) mountain bike riders were more hostile to eMTBs than other users, and 2) advocates for mountain bikes, such as IMBA members, were the most hostile. It's ironic, b/c both eMTBs and MTBs face the same opposition to access and should be working together.
Fortunately, as you said, most states and counties in US are much more open to eMTB access. There are many successes at the local level.