Set boundaries to help others achieve their best
It is common for relational people to have boundary issues. Boundary issues also exist for people who like to help others succeed, not always the same thing. With either of these mindsets or desires, there is a fear that if you say no to another person, no matter the nature of the request or the timing of the request, you will miss out on something or be seen as unhelpful. The fear is someone might not like you or value you because you created a boundary by saying no. But the inability to set boundaries is self-limiting. A lack of boundaries is more harmful than helpful. Think of it from a business context.
In business, your capacity to help others is impacted by
Your transferable skills/knowledge/abilities. Do you have things others would benefit from knowing or learning from you?
Your ability to teach others. Do you have the ability to help others learn what you know to do? This requires you to be able to identify the process/skills that make you successful and to be able to talk about your success in ways others understand and can apply to their situation.
Your ability to earn the right to get others to listen.
Your results are one way you can get others to pay attention. People will think things like, "That person achieved 'X,' and I want to achieve 'X,' so I should get to know them."
The hierarchy or formally assigned authority. People believe they are supposed to learn from others who have more experience or a greater title in the organization. They believe this until experience proves or disproves it.
How you treat others. If you treat people well, they will be drawn to you and want to learn from you; even if you don't have a formal engagement or specific thing you are teaching them, they will keep coming back.
Your ability to create the time to help. Helping others grow takes time. It will always fall into the category of important but not urgent. Therefore, helping others will always get deprioritized against work in both the urgent/important and urgent/unimportant categories. The only way to create time is to create a boundary, like saying no to unimportant things.
Your ability to maintain enough energy to help. You can't give from an empty tank. You must ensure you have enough energy stored so you can give attention and effort to others. To have energy you must reserve some, so you must say no to some things that take energy so you can say yes to more things that give energy.
Conclusion
In business, your ability to help others is limited only by YOU. The last two items from the list require YOU to set boundaries. Boundaries help YOU not become your own worst enemy. Boundaries help YOU help others in meaningful and sustainable ways because you will have time and energy to help. Set some boundaries and see the fantastic good that happens next. Spoiler alert, the good of setting boundaries won't just be for the people you help; it will be better (I so wanted to say gooder) for YOU too!