If dumpers can dump coins and tokens in a reasonable way it won't affect the value much , lose in value when dumping happens if a dumper dumps huge amount of the token at once , this is a wrong way to dump coins, this is why till date some devs put locks on their tokens ,some even release percent by percent on term basis just to avoid huge dump.
The best way to dump is not to dump in an instant or a whole at once
What are you trying to justify, you want to justify why these developers are delaying distributing tokens or locking their tokens, this could only mean that their token is a pump and dump coin and it has nothing to offer they are afraid that it will eventually dump because they run a shit project.