In Destiny 2, what sets you apart from other Guardians in public locations are your titles! If you see a player with a Golden Conqueror title and a certain number, that means that player has been at the top of the PvE game for multiple seasons, clearing Grandmaster content. If you see a Player with a Golden Flawless title with a number, that means you're looking at a great PvP player.
Every single title has a Seal connected to it which requires certain triumphs completed to obtain them. Some have as few as four triumphs attached to them like Conqueror, but some can have dozens! The number of triumphs doesn't dictate the difficulty or the time investment. Some Seals can be completed within a few hours by professional players, but it may be impossible for an average player. Some seals just require a huge time investment.
If you have a particular triumph you don't have time, team, or knowledge for, Seal Boosts are the perfect answer. There should not be a gate or a punishment for a solo player with a limited amount of time. It's becoming a recurring thing where gamers with real jobs neglect their hobby and it reflects poorly on their mood, even if they don't know it.
Let us complete the grind instead of you, and you get to use all of your gaming time on important things and content you like!