Absolutely not. Reasonable is not something you don't come across often with noobs or just straight up ignorant people when dealing with fish. The majority of people buying common plecs at petco when i worked there were also buying there 10 gallon starter kit and an assortment of tetras/mollies etc. Given the fish did survive and outgrew the tank, most of these
people would get mad at me for telling then they need to spend $10 on a heater. The last thing they are going to do is upgrade. As the care and livelihood of their animals is supposed to cater to their personal wallet.