No, the idea is still to go clear on xc, and the actual winner will likely have gone close to clear because there will be people scoring mid 70’s in the dressage who will be closer than 28 seconds away at the start of xc, so LG will have to at least try to come close to optimum time if he wants to stay in range. But overall the horses certainly aren’t selected for the ease at which they’ll run and jump for 11 minutes anymore because to be truly competitive you’ve got to be 75% or better in the dressage unless you get lucky.
As an aside, some of the worst xc falls I’ve ever seen have been from riders coming in slow and underpowered so it’s not speed that’s necessarily dangerous. there’s some data that seems to show that it’s the intense combination of speeding up and slowing down that creates some of the problems.
Back to your question. A couple of reasons for the scoring. First, it’s left over form the long format days when it was perceived as necessary for correctly weighting the phases. The elimination of the endurance part triggered the law of unintended consequences. Eliminate the difficult xc, and suddenly everyone is bunched. Then you need some way to differentiate the horses, so make the dressage tests and SJ more difficult (and the xc more technical). Remove the relation of both phases to xc from the directives and judge them on their own merits, not as they relate to the horse’s ability to perform both in xc and dressage (fit and obedient enough) or xc and sj (energetic and sound enough after xc to do basic SJ)
In the past, not many horses that could pull close to 80 in the dressage would have the physiology to make it safely and successfully around a real long format xc so there was no point in trying. Now they can. So eventers bought warmbloods and drilled drilled drilled the dressage. Some of them needed so much fitness work they had trouble staying sound beyond one or two FEI events. So demand perfect footing. Or shorter courses, etc. So costs increase, etc. etc. There was a bit of a course correction after people realized that the WB needed a good amount of blood to succeed at the upper levels even with the short format, but now you have the faux eventing like WEF, etc. so we’re effectively in the process of changing the sport again to allow dodgy xc horses to succeed.
Finally, the FEI is dominated to some extent by the European warmblood breeders and by preserving the dressage scoring while completely eliminating the endurance component, they opened a new market for their horses that aren’t quite good enough for straight dressage or SJ at the highest levels. $$$$$
The funniest part of the whole thing is that the best rider in the world is a rockstar at all of it and does make the time so people point to him and say that if the best wins, what are people complaining about.