Experts without the right tools?

We bought a new AC for our office recently and a team came for installation. The team that came to our office had 3 people (one expert, one semi-skilled and one newbie).

I started observing their work and here are somethings I noticed:

• Whenever they are using an insulation tape and need to cut it, they did not use a scissor / knife, instead they pull the tape with a brute force to tear it off / bite it to cut it with their teeth
• The copper wire that connects the indoor and outdoor units needed extra length, which initially they did not calculate resulting in a delay of 2 hours
• He estimated the length of the extra copper wire required, cut it and brazed it with the copper wire that came with the AC unit, only to find that it was a little short and had to cut another small piece of extra copper wire and braze it again
• For bending the copper wire, he did not have the right tool, but did it manually, resulting in poor fit and finish

So, I asked him why not carry the right tools for their work as they could do the work faster and in a better way. He replied that he doesn't like to carry many tools, other team members use them and not return them, the tools are costly, etc.

I had come across many plumbers, carpenters and electricians who do not carry proper tools for their work. I always wonder how they would improve their quality of work over a period of time? Do they really care about great quality work?

What are your thoughts on this? Can we call them an experts if they do a lot of reworks / do not use proper tools?

-Team Hash LLP