parse_arguments: Fix bool type

[Grazfather]

The parse args set the default argument value behaviour for bools inconsistenly with the other types: A function had to say 'False' if it wanted the default to be 'True'. This fixes that.

[github-actions]

🤖 Coverage update for b513ae8 🟢

	Old	New
Commit	219d46f	b513ae8
Score	71.7764%	71.7959% (0.0195)

[github-actions]

🤖 Coverage update for b513ae8 🟢

	Old	New
Commit	219d46f	b513ae8
Score	71.7764%	71.7791% (0.0027)

[github-actions]

🤖 Coverage update for a5620e3 🟢

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Commit	219d46f	a5620e3
Score	71.7764%	71.7764% (0)

[github-actions]

🤖 Coverage update for a5620e3 🟢

	Old	New
Commit	219d46f	a5620e3
Score	71.7764%	71.7791% (0.0027)

[github-actions]

🤖 Coverage update for 98d59b6 🟢

	Old	New
Commit	219d46f	98d59b6
Score	71.7764%	71.7959% (0.0195)

[github-actions]

🤖 Coverage update for 98d59b6 🟢

	Old	New
Commit	219d46f	98d59b6
Score	71.7764%	71.7791% (0.0027)

[hugsy]

I swear there was a valid reason for default to True but I cannot remember it. Let's go ahead with it, it's not a change that'll break core functionalities anyway.