OP, you need to look at comparable bikes before we can say the 29.5lbs Doppler is such an outlier. None of the bikes you listed are even steel.

How about a Surly Disc Trucker; steel, designed for loads, mechanical disc, $1.5k, 28.1lbs.

Add SS fenders from Velo Orange, 800gm (1.75lbs) and let's say .25lb for the hydro disk upgrade to the mechanical BB7s on the Straggler (caliper variance alone is 85gm, so plus levers at say 20gm ea?) and that puts Disc Trucker at 30.1lbs, more than 1lb heavier and more than $500 more expensive.

Again, when looking at comparable bikes, the Breezer doesn’t seem like a heavyweight outlier. Hang around with the rando/brevet guys, and it’s not uncommon to see 30 - 35lbs rigs, so context is important.

Whether you want or need a bike with lots of trail that’s dead confident bombing down a curvy fire road in the wet while carrying 30lbs of stuff is another matter which may recommend for or against a Doppler, but given Breeze’s decades of acclaimed bike design, wondering if one of his bikes will adversely affect your riding is a waste of time. It’s far more likely it will set a new high bar for your bike handling expectations.