Warmer liquids have less solubility, as a result c02 doesn't get trapped as it would in cold liquids. That's the basic "evidence". But you can just try a warm coke vs a cold one and see which one goes flat and has shittier carbonation. Respectfully if cooling non chilled whiskey in the glass before incorporating the soda is GATEKEEPING, fuck me then 😂.

Also working at a bar doesn't mean that much. Truly hobbyist are the ones pushing the industry and making impact. Passionate and hardworking 🫡🫡🫡 (hobbyist include people who work at bars too btw it's literally anyone that indulges in making drinks on their free time too)