Scarcity mindset

[Daniel Featherston]

I've been getting in touch with investors in my local market, introducing myself while seeing if there is anything I can do to help/learn and I've found multiple instances where the person contacted isn't interested in getting help or helping because "I don't want to train my competition". My intention isn't to be greedy and steal deals, but rather help find new ones and bring opportunities that otherwise he/she wouldn't come across.. This doesn't happen every time, just more often than I anticipated.

Is this scarcity mindset necessary in real estate investing?

What percentage of investors think like this? 

Looking forward to your responses!