Status actually makes a difference, though I will say just going to Select is not a big jump since it just allows you to book 7 days at 13 months with no premium.
If you stay at Marriott Hotels, it gets you Platinum status which includes lounge and 4pm check out (at non-resorts) which is nice.
I am lifetime Titanium so we have that in my wife's name so she gets Platinum when she travels without me.
For us going to executive was only 1000 points (and bought during COVID so passed ROFR at a low price)
That unlocked 13 month for any number of nights and the 30 day reservation discount (which we use a lot.)
So going to Executive for a few points was an easy choice, not sure I would do it just for status.
For the OP, 1500 is too few points so maybe buying the 3500 resale might be worth it if they plan to travel a lot and don't want the risks of renting points.