I think thats a point of saved money by the manufacturer.
I had in the past melted deans in bigger models and thats why I changed to 4mm gold plugs (1:10) or kept the
xt90 in the Nero Big Rock.
I am limited in case of Nero by the grip of the tires!

Deans I just use up to 30 amps maybe. For example 1:18 LRP Shark or 1:18 TC. For 1:24 and 1:36 I use the red
BEC-connectors.
Higher watts (V x A) -> bigger connectors; up to
XT150 in some planes.
So its up to you, If you prefer less resistance, use good connectors. It is not so important.... keep them.
I learned for me from the past, cause that issue hat cost me a expensive LiPo at that time.
Regards,
lonee