@StinsonAlliance84, before you get too despondent, have a little trawl through the forum threads and look for “small hands” issues/comments: there is a wealth of advice & support for folk who believe they will never manage to make those stretches - yet so far we haven’t had anybody come back after a few weeks and say “See, I told you I couldn’t manage”, and we have a few players who have exceeded their hoped-for level of playing.
Some people get there simply by practicing as best they can, accepting that it’ll take a little time to get their hand used to a new routine. Other people find that micro-shifts work best for them. @JoshFossgreen has been playing for a long time so has had plenty of opportunity to improve his technique to that level, but even he will admit that his stretch is at the further end of ‘normal’ (I’m trying not to say he has freakish alien fingers). (again).
I started the course about 4 months ago and for non-music related reasons I’ve had to take a break for over a month now, but when I first started I found that although I could stretch to one finger per fret on a four fret spread, I could only practically do it from about 5th fret and up. After a few weeks I found my fingers spreading more easily, and by halfway through the course I only found the very bottom of the neck any sort of issue - and even then, only for fast changes.
I picked up my bass again on Friday this week and went back a few lessons just to ease back into laying, and I’ve found that the 4 fret stretch is awkward and even a little bit painful, but I know that I felt that way to begin with and this is to be expected after so many weeks of not playing.
Stick with it, don’t fret about it (pun intended), and enjoy the overall experience. The point of each lesson is to push you a little further along the road, but you (probably) won’t be a master of it first time. The musicians’ mantra is “practice, practice, practice”.