Bottom lines?
Everyone has their own bottom line.
For the publishers, the bottom line is all about the Benjamins.
Ostensibly, it's about people using their product, because more users equals more money. Realistically, however, they really don't care whether or not you USE their product, just that you BUY their product.
I'm going to go out on a limb here, and speak for the average gamer (I think I qualify... I've been gaming for over 25 years, I've seen the average gamer... in the mirror.

).
The bottom line for me (and I suspect for many... possibly even most gamers) can be summed up thusly: how useful is the product to ME?
Print and PDF products normally have the same usefulness to me, if the content is there. Restricting, however, the portability of the product restricts its usefulness to me. You see, game nights are not always at the C. Baize house... Sometimes they're at the Lichkicker house... sometimes they're at the Athen Windwalker house, sometimes they're somewhere else, entirely...
With most PDFs, I can take them with me on a CD and read them on the computer at the house where the game is being held.
I can take my books with me, wherever I go, as well.
With this new lockdown thing that Malhavoc and other DTRPG only companys are actively embracing, it severely limits the usefulness of future Malhavoc (and other DTRPG only companys, obviously) product, until it hits print. This means I'm not likely to purchase future Malhavoc PDFs... if I don't purchase the PDFs, I won't know about them (my FLGS doesn't carry Malhavoc product), therefor, I won't order the print versions when they come out. Bottom line is that Malhavoc, therefor, loses potentially two sales of the same product to me (and likely to others as well). I haven't purchased EVERY Malhavoc PDF, but I have purchased several, and would likely have purchased several more in the future. But I won't, as long as they have the restricted usefulness. This isn't to say that I'll never purchase another Malhavoc product, but it is to say that I'll not purchase locked down PDFs... I did, once, and was completely unhappy with the lack of usefulness of the product. I'll not do it, again.
I don't require all the players to have copies of the books. They can borrow mine (in which case I do without them for the week), or I can pass them across the table to them while at their house. By the same token, they can use the parts of the PDFs I bring on CD, while I'm at their house (though I don't leave the CDs there).
Another point about PDF convenience. If I have a computer crash, and my CD backup is destroyed, for whatever reason, I can get a new download from RPGNow... apparently I can't do the same from DriveThruRPG, again limiting the usefulness of their product.
This brings to mind another question... For those companies who have moved to DTRPG... If I should lose my copy of a previously purchased product, have I now LOST the recourse I had of re-downloading (at no extra charge) the product I already purchased? Must I now RE-purchase the product?
You claim to not be taking anything away... well... There's one thing.
I wish you and DTRPG well with future sales, though my Benjamins will not be flowing your direction.
I may only be pennies to you... but pennies add up after a while.