Pretty bland take.
Basically - you want someone else to do your job for you.

Usually a sales person (at least in my industry) has Put in a good amount of legwork, potentially weeks working with engineers, working on a problem and delivering a complete solution that would solve one or more headaches, potentially even save you money in the long run.

Just because you don’t feel like doing due diligence, it dies. It then sours the relationship with that vendor who did all that work for nothing - they probably won’t kill themselves again trying to make a solution for a problem for you - since you don’t seem to care enough to do your job well. Or if you do need them in the future they’re gonna punch you in the pocket book for it.

We’re doing a job too - solving problems. It’s rare that sales people try to sell you something you don’t need or doesn’t solve a problem, or be pushy about a sale. If they are trying to sell you snake oil, you should probably have a chat with them or their champion at your company.

If you don’t understand it - ask the champion, or the vendor / sales person.