i did ufw wrong but got the result i wanted. Any Clarity if this is ok.

[glitchgod 0]

So i like to use EDDIE but i seem to have issues with it and unbuntu 20.04, 
It sometimes starts on boot and sometimes it doesnt connect when it does start,
Cause of these 2 major reasons i was looking in to adding in a firewall through UFW. I choose UFW cause it seems to be what alot of people use and people seem to give very interesting ways on how they implemented it. 
So i followed one and was one step 5 but seem to have gotten the result that i wanted.

4. Enable UFW 
sudo ufw enable

5. Bloack all traffic
sudo ufw default deny outgoing
sudo ufw default deny incoming

now there are alot of other steps after this but it seems that just this step works.
Computer starts no internet, Eddie starts and connects and all good.
I "tested" it and see that i cant ping or browse the internet with it just set up like this unless eddie is connected,  so im happy with it. Now the question is, is it okay to have it like this? Seems to work great but what is the downside ?