Sounds like a fake engineer to me.
Fact remains that no Mercury Atlas spacecrafts with pilots ever flow anywhere.
Facts demand proof! So YOU prove "that no Mercury-Atlas spacecraft with pilots ever flow anywhere".
OK, it seems that 30 fuses were fitted to enable the Mercury-Atlas thing to fly safely. But no spare fuses were provided aboard.
Where is the source of your "no spare fuses were provided aboard"?
An obvious place for spare fuses would be in the fuse boxes.
But whatever the case it's not evidence of anything.
On my ships there are plenty fuses and if one is blown the ship's electrician fixes it. The Mercury-Atlas thing had no electrician aboard to fix fuses = clear evidence that the whole thing was Fake News to fool the public. Actually the communists in USSR had made a similar thing a little earlier to cheer up the comrades there. Ever heard of Yuri Gagarin? First man to orbit Earth in space. But it was just communist propaganda.
You don't fix fuses chap.
Mercury capsule had a number of fuses for the electrical systems, however, the vital systems were controlled over a solid conductor system. Standard system was set up in a switch arrangement, fuse trips, check sources of outage or switch to secondary power source and flip switch, no need to leave your seat.
Vital systems had a three way switch, position 1 for normal mode, position 2, second solid conductor for emergency operations.
So without leaving the seat the capsule pilot can sort out minor electrical issues and control power to the essential power systems, massive amount of redundancy for short flights.
The fusing systems required for space flight are a piece of cake compared to maritime rated electrical systems, going out to sea being a much harsher environment for electrics. So if you believe there are ocean going vessels, im struggling to see how you think space flight is fake news because fuses?