In my world it will work I have 6 or 7 that I converted and no problems.
Another thing , every time you open a refrigerator door you let in hot air and moisture that could cause the same thing as you are talking about. In addition cold air drops so when you route the drain line to the bottom of the coach a little bit of cold air meets the hot air and it never reaches the coils. I don't buy every video I see either like that chick from FORD making a big deal about a stupid little drain line. Just like we are. I have been in the Construction Management/HVAC business for 50 years and worked with hundreds of engineers. No need to say no more.
NOTE: When you route the drain line through the refrigerator vent the temperature is the same ambient temperature as running through the bottom of the coach. Maybe higher because the bottom of the coach is not in the sun.