With the two most recent Rugby World Cup titles and last year's Investec Rugby Championship on their trophy shelf, the South Africans are riding high, but Botha is concerned that not enough teams are progressing their game.
Botha, 66, told Sportsboom.com, "Where South Africa is at the moment is absolutely fantastic, and it's great to see the pool of players that we have.
"Rassie [Erasmus-coach] and the team are really thinking outside the box. They're doing a great job. We're on a level that's very difficult for other teams to get to.
"I'm a little worried about rugby at the moment because we're one of the few teams that's really progressing worldwide."
Botha said the modern-day Springboks deserve to be rated among the greatest rugby sides.
"One win does not make a great team, a magic moment does not make a great team. But magic season after season after season makes a great team.
"By repeating in 2023 what they did in 2019 and winning the World Cup again, they did something that nobody can ever take away from them. They are the first South African side to do that. So who can you compare them to?"
While acknowledging it was hard to compare eras, Botha said the 1981 Springboks to New Zealand was a good team, as was the team that beat the Cavaliers in 1986. Others to be considered were the 1937 Springboks, who won a series in New Zealand, while the 1974 British & Irish Lions, who started in New Zealand in 1971, had been great, as had the 1984 Grand Slam-winning Wallabies and the 2003 England team.
"And what about the New Zealand teams since then? Forget about World Cups, which you win in six or seven weeks, for the last 20 years, who has really dominated rugby before South Africa, and you'd have to say the All Blacks, so give them credit as well.
"But the pleasure of this current Springbok team is that they have taken over and are playing at a different level. For once the world is following South Africa. I do not mean to sound arrogant, but I don't think the rest of the world wants us around. They're even trying to make laws to eliminate our dominance instead of letting rugby be rugby and allowing the game to succeed.
"There is enough nonsense outside of rugby, we don't need to let it on to the field."
Botha believes skipper Siya Kolisi continues to have a role in the Springbok side and expects he will play a major role in the build-up to the 2027 Rugby World Cup in Australia.
"There is a time to come, and there is a time to go. It's not his time to go yet. We can wait a little bit on that one.
"It depends on the physical side. A player will wake up one morning...and we all do. And you say, 'This is enough.'
"At the moment, the way he's been playing, I don't think he can say it's enough. There's still a little bit of fire in the belly.
"And as long as the fire is in the belly, you keep playing him. Because, he's a fantastic captain. He's a great ambassador for South Africa."