The difference is, I didn't say "Here's a better UX". I said "This is an appropriate use for the UX". I didn't back it up with testing because I wasn't saying anything that needed backing up. I wasn't making a value statement, or insisting on a quality of the UX; I just said that toasts were appropriate for certain functions - not that there was no better way to handle the UX.
You, on the other hand, absolutely did make a value judgement. You said "better". And okay! I'm fine with you having a better UX! I'd love to know more! Please, provide any information you have on why yours is better!
If you need more help deciphering the difference: I was arguing against the blog author's EXCLUSIVE argument ("actually, this is appropriate, so it's not that toasts are NEVER good UX"). You are arguing for your own EXCLUSIVE argument ("the good things about this way aren't available with your way"). If you don't understand why exclusive arguments merit more evidence than arguments for maintaining inclusion (as opposed to changing to be more inclusive), I'd recommend boning up on formal logic.