I don't see that as an issue.
If "the site crashes" it would simply not be required.
What's more concerning (imo) is listed requirements.
From link I posted earlier...
A valid passport
Proof of travel plans, including tickets into and out of Thailand
Accommodation details, such as hotel bookings or residential addresses
Evidence of sufficient funds to support their stay (e.g., 10,000 THB for single travelers, 20,000 THB per family).
If such items actually included flight tickets (especially onward/return), "evidence" of sufficient funds, etc then that would put some folk off