The problem is that these freeway projects were decades in planning and LRT had only been proposed in the last several years, if that. It seemed pretty unlikely that MDOT was going to stop or change these plans since they were pretty much already in motion (funding, studies, planning, etc). By comparison, LRT was still a pie-in-the-sky idea that, even now, doesn't really seem fleshed out yet.
Although it would have been nice to divert funds from the freeways to transit, it's just simply too late in the game. Detroit's saving grace is the possible removal of 375 since that is pretty much in the early stages of planning.
Had LRT been proposed in Detroit maybe 15 or 20 years ago, we surely would have had it by now or at the very least, had very large support for it. But of course, things were even more politically unfavorable then than they are now so this is the outcome.
In the end, this is still a pretty autocentric metropolitan area and transit still has a long way to go before it's a normal mode of transportation. Hopefully in the future, transit will get this type of funding, but today is not yet that day and I wouldn't get upset over what can't be changed.
Btw, here's videos on each project from MDOT.
• Video Link
• Video Link