This stuff was NEVER advertised to carry over. Neither was everything else you put so much "work" in.
If you want your old gear to remain useful way later in the game, then go play World Of Warcraft where Transmogrification is a thing.
Destiny Is a videogame. It is a luxury. You will survive without your silly emotes, fancy sparrows and the other crap you bought.
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Stop acting like you know everything newb. For those of us who were here in the beginning, bungie promised us that all of our progress and items would carry over to the future installments and then broke that promise. We spent hours leveling up, getting gear, and accomplishing amazing tasks expecting to carry these things with us only to get slapped in the face by the people who said we could do it.