And I will add: -
Many people here are flyers, or have been, and many try to reproduce models, either for their families (some of whom are veterans, many of whom have passed away), or perhaps as mementoes, or just because they enjoy re-creating a certain part of history in miniature.
Some are new to the 'aviation scene', some are 'old lags', some are experienced modellers, and some are brand-new to modelling.
The Group Builds have realised a h*ll of a lot of research, sharing knowledge, sometimes unknown facts, and bringing to attention some fascinating facts.
The 'P*ss*ng Contest' you mention has absolutely nothing to do with ego, or any other 'look at me aren't I good' scenario.
Rather, these little icons are a way of recognising the efforts of those who take part, either in the sharing of knowledge and experience, producing a 'monument' to an individual, or, in simple terms, just trying their best to take part and hopefully improve their skills.
The combined experience and knowledge of the members of this forum ensure that all those who require and ask for help, given that it is not for personal or financial gain, will get that help - freely and with no 'strings attached'.
If you have a problem with such people gaining a tiny little picture under their posts, may I suggest that you sit back, reflect and scan this forum more closely - then perhaps you can criticise.