Firestone Complete Auto Care

I called a different place to have the transmission fluid changed on my 2004 Dodge 1500 Ram. I was told to bring my truck in and they would look at the see if they would do the job — sounded like an odd response to me but I still showed up at 8:00 AM Monday morning.
My truck has 108K miles; Trans last changed in 2009 with 44K miles; 70% Hwy miles; towed a 6K lb. camper for about 2 years occasionally. I have records of every service since I drove the truck off the lot brand new in 2004 — nothing major — usual as expected servicing.
The guy looked at my truck; didn’t start it; noticed the trailer brake. He checked the dip stick for Trans fluid and said he can feel too much grit (I felt very minimal; fluid was very clean still). He said he would not do the job cause he did not want to risk messing up Trans. I told him I would sign a waiver to be sure he was not responsible if the Trans failed in a 1000 miles. He still said no, he didn’t want me to be angry with him if he changed the fluid and caused issues with Trans soon after.
What a A-​hole I thought.
I went straight to the usual Firestone shop I use for tires and oil charges. (Why I didn’t do this in the first place I do not know!!) They took the job in right away. Dropped the Trans pan, very little metal shavings and the shavings that were there were all caught by the internal magnet. Changed both filters, new gasket & all is good; done in less than 2 hours. Told me transmission is in great shape — no worries.
Why did I go to the other clown in the 1^st place???
Thanks again Firestone.