I have been a Marriott member for 28 years. I am lifetime platinum. Retired now so points are harder to come by.
I am earning most of my points with Chase rewards.
To redeem a room with Marriott points at the Springhill Suites in Springdale Utah costs 50,000 Marriott points. Same room,same day it costs 24,000(tax included) in Chase rewards points.
So the point is—Always check before you transfer your points to Marriott.
If you already have Marriott points then that’s another story.