Every businessman will only partner when there is a mutual benefit that can be obtained and also there is mutual need between the other party and himself in the scope of the business he is running. Because if there is no potential for mutual benefit and mutual need, of course only one thing must be run and thought about more maturely, namely about competition with other parties in terms of doing business because now there are enough similar businesses so that all business owners must be able to provide the best to each of their own customers.
Their is a lot of business ideas that you have share to get investors into you business and that will be partnership but that will be depending how your financial capacity will be what will determine if you will be interested in doing a joint business or not but if you look at most successful businesses and companies still do a joint to strengthen the company because your money can not just be enough especially when you want it to be big. Even without you saying it the partners must request a mutual benefit that is for sure. When their is partners they might even have a better way for you to handle any form of challenges because competition is actually a challenge, but when you have a lot of partners they might even be more experience than you. The idea of partner is not a bad thing at all, business needs all the hands we they can get.