There are reasonable and/or historical explanations for all of the above and they're readily available on the web to anyone who's sincerely interested.
I'm not sure that the Swiss Guard qualifies as an army but even if it does, protecting the Pope seems like a good idea to me. He has numerous enemies.....increasingly so, it would appear.
Of course, the good Lord can and does intervene miraculously when needed, as with JPII in 1981 but God does not want us to abandon normal human prudence and common sense.
If the substance of your argument is, “Well, this may all be true, but so what?”, then we will just pray that God lifts the scales from the eyes.