This may not be a popular viewpoint, but to me: Why should I be made to feel as if it's my responsibility to "grow" this hobby as well as introduce young people to it?
Personally, I will be involved in model railroading in whatever form I can: New product (if available), secondary market (for desired items out of production), vintage (if desired and/or can be made usable), kit bashed and/or scratch bashed/built (IF no other way).
That's because trains have been a part of me before I can even remember. Trains and railroading is in my blood, and I will always and forever be interested in trains. You can't INSTILL that into folks. It's either there or it isn't, and oft times even those that such is in... can't tell you why.
So, the hobbyist should help "promote" and "grow" this hobby?
Frankly, it's not my worry. It's up to those that derive income from the hobby to promote it for their own gains. Not mine.
My "Prime Directive" in regards to this hobby?
Simple: To enjoy it and have fun.
There's more product in my chosen scale than I will EVER be able to acquire even a minuscule PORTION of. No way, ever.
For decades railroading was my avocation, then my vocation, and now I'm retired on RR retirement. Railroading produced my family-supporting income, and railroading was my way of life. And though railroading was work, I loved it. Those days are behind me.
By huge contrast, model trains are my HOBBY. There's a HUGE difference between model trains being one's hobby and deriving income from the hobby. In the past I made the mistake of making my hobby of model trains also become a source of income via custom assembly/detail/paint/decals/etc, as well as professionally designing and installing model train layouts commercially.
Doing so nearly ruined my hobby.
Even after shutting down those endeavors, it took a couple years for the enjoyment of my hobby of model trains to return.
SO... those of you (hobbyists) that feel motivated to promote and grow this hobby: More power to you. Have at it.
Just remember: Though a hobbyist may feel it's their personal mission and moral responsibility to "promote and grow" the hobby... BUT...
It ain't mine. Further, I'm not having any part of any idea that it should be. (AND... I highly suspect there are throngs of others hobbyists that feel the same way.)
As a hobbyist, MY goal is simple: To have fun. Along the way that means CONSUME available product that others depend on selling in order to survive. Thus, it's THEIR responsibility to grow their own market, not mine.
Sure glad General Motors, or Ford Motor Co, or any other manufacturer/producer of goods aimed at a market, don't try to guilt-trip us consumers into feeling obligated to helping them promote and grow THEIR market.
No, such a phenomenon seems to be unique to certain segments of the hobby industry. (Which I suspect is primarily pushed by the SUPPLIERS of said hobby for their own purposes.)
SO... I'm a hobbyist and I will always be in this for personal gain: To have fun. To quote Major Payne: "That's my 'business', and business is goood!"
Andre